mirror of
https://github.com/betaflight/betaflight.git
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198 lines
6.8 KiB
C
198 lines
6.8 KiB
C
/*
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* This file is part of Cleanflight.
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*
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* Cleanflight is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Cleanflight is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Cleanflight. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdbool.h>
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#include <stdint.h>
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#include <string.h>
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#include "platform.h"
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#include "system.h"
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#include "io.h"
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#include "io_impl.h"
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#include "rcc.h"
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#include "sensor.h"
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#include "accgyro.h"
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#include "adc.h"
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#include "adc_impl.h"
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#ifndef ADC_INSTANCE
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#define ADC_INSTANCE ADC1
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#endif
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const adcDevice_t adcHardware[] = {
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{ .ADCx = ADC1, .rccADC = RCC_APB2(ADC1), .rccDMA = RCC_AHB1(DMA2), .DMAy_Streamx = DMA2_Stream4, .channel = DMA_Channel_0 },
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//{ .ADCx = ADC2, .rccADC = RCC_APB2(ADC2), .rccDMA = RCC_AHB1(DMA2), .DMAy_Streamx = DMA2_Stream1, .channel = DMA_Channel_0 }
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};
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/* note these could be packed up for saving space */
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const adcTagMap_t adcTagMap[] = {
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/*
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{ DEFIO_TAG_E__PF3, ADC_Channel_9 },
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{ DEFIO_TAG_E__PF4, ADC_Channel_14 },
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{ DEFIO_TAG_E__PF5, ADC_Channel_15 },
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{ DEFIO_TAG_E__PF6, ADC_Channel_4 },
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{ DEFIO_TAG_E__PF7, ADC_Channel_5 },
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{ DEFIO_TAG_E__PF8, ADC_Channel_6 },
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{ DEFIO_TAG_E__PF9, ADC_Channel_7 },
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{ DEFIO_TAG_E__PF10, ADC_Channel_8 },
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*/
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{ DEFIO_TAG_E__PC0, ADC_Channel_10 },
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{ DEFIO_TAG_E__PC1, ADC_Channel_11 },
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{ DEFIO_TAG_E__PC2, ADC_Channel_12 },
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{ DEFIO_TAG_E__PC3, ADC_Channel_13 },
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{ DEFIO_TAG_E__PC4, ADC_Channel_14 },
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{ DEFIO_TAG_E__PC5, ADC_Channel_15 },
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{ DEFIO_TAG_E__PB0, ADC_Channel_8 },
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{ DEFIO_TAG_E__PB1, ADC_Channel_9 },
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{ DEFIO_TAG_E__PA0, ADC_Channel_0 },
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{ DEFIO_TAG_E__PA1, ADC_Channel_1 },
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{ DEFIO_TAG_E__PA2, ADC_Channel_2 },
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{ DEFIO_TAG_E__PA3, ADC_Channel_3 },
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{ DEFIO_TAG_E__PA4, ADC_Channel_4 },
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{ DEFIO_TAG_E__PA5, ADC_Channel_5 },
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{ DEFIO_TAG_E__PA6, ADC_Channel_6 },
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{ DEFIO_TAG_E__PA7, ADC_Channel_7 },
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};
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ADCDevice adcDeviceByInstance(ADC_TypeDef *instance)
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{
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if (instance == ADC1)
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return ADCDEV_1;
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/*
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if (instance == ADC2) // TODO add ADC2 and 3
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return ADCDEV_2;
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*/
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return ADCINVALID;
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}
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void adcInit(drv_adc_config_t *init)
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{
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ADC_InitTypeDef ADC_InitStructure;
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DMA_InitTypeDef DMA_InitStructure;
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uint8_t i;
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uint8_t configuredAdcChannels = 0;
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memset(&adcConfig, 0, sizeof(adcConfig));
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#if !defined(VBAT_ADC_PIN) && !defined(EXTERNAL1_ADC_PIN) && !defined(RSSI_ADC_PIN) && !defined(CURRENT_METER_ADC_PIN)
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UNUSED(init);
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#endif
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#ifdef VBAT_ADC_PIN
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if (init->enableVBat) {
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adcConfig[ADC_BATTERY].tag = IO_TAG(VBAT_ADC_PIN); //VBAT_ADC_CHANNEL;
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}
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#endif
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#ifdef RSSI_ADC_PIN
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if (init->enableRSSI) {
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adcConfig[ADC_RSSI].tag = IO_TAG(RSSI_ADC_PIN); //RSSI_ADC_CHANNEL;
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}
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#endif
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#ifdef EXTERNAL1_ADC_PIN
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if (init->enableExternal1) {
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adcConfig[ADC_EXTERNAL1].tag = IO_TAG(EXTERNAL1_ADC_PIN); //EXTERNAL1_ADC_CHANNEL;
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}
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#endif
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#ifdef CURRENT_METER_ADC_PIN
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if (init->enableCurrentMeter) {
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adcConfig[ADC_CURRENT].tag = IO_TAG(CURRENT_METER_ADC_PIN); //CURRENT_METER_ADC_CHANNEL;
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}
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#endif
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//RCC_ADCCLKConfig(RCC_ADC12PLLCLK_Div256); // 72 MHz divided by 256 = 281.25 kHz
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ADCDevice device = adcDeviceByInstance(ADC_INSTANCE);
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if (device == ADCINVALID)
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return;
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adcDevice_t adc = adcHardware[device];
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for (uint8_t i = 0; i < ADC_CHANNEL_COUNT; i++) {
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if (!adcConfig[i].tag)
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continue;
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IOInit(IOGetByTag(adcConfig[i].tag), OWNER_ADC, RESOURCE_ADC_BATTERY + i, 0);
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IOConfigGPIO(IOGetByTag(adcConfig[i].tag), IO_CONFIG(GPIO_Mode_AN, 0, GPIO_OType_OD, GPIO_PuPd_NOPULL));
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adcConfig[i].adcChannel = adcChannelByTag(adcConfig[i].tag);
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adcConfig[i].dmaIndex = configuredAdcChannels++;
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adcConfig[i].sampleTime = ADC_SampleTime_480Cycles;
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adcConfig[i].enabled = true;
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}
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RCC_ClockCmd(adc.rccDMA, ENABLE);
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RCC_ClockCmd(adc.rccADC, ENABLE);
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DMA_DeInit(adc.DMAy_Streamx);
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DMA_StructInit(&DMA_InitStructure);
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DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&adc.ADCx->DR;
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DMA_InitStructure.DMA_Channel = adc.channel;
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DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)adcValues;
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DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
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DMA_InitStructure.DMA_BufferSize = configuredAdcChannels;
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DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
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DMA_InitStructure.DMA_MemoryInc = configuredAdcChannels > 1 ? DMA_MemoryInc_Enable : DMA_MemoryInc_Disable;
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DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
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DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
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DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
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DMA_InitStructure.DMA_Priority = DMA_Priority_High;
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DMA_Init(adc.DMAy_Streamx, &DMA_InitStructure);
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DMA_Cmd(adc.DMAy_Streamx, ENABLE);
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ADC_CommonInitTypeDef ADC_CommonInitStructure;
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ADC_CommonStructInit(&ADC_CommonInitStructure);
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ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;
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ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div8;
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ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled;
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ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles;
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ADC_CommonInit(&ADC_CommonInitStructure);
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ADC_StructInit(&ADC_InitStructure);
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ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
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ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
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ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC1;
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ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
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ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
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ADC_InitStructure.ADC_NbrOfConversion = configuredAdcChannels;
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ADC_InitStructure.ADC_ScanConvMode = configuredAdcChannels > 1 ? ENABLE : DISABLE; // 1=scan more that one channel in group
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ADC_Init(adc.ADCx, &ADC_InitStructure);
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uint8_t rank = 1;
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for (i = 0; i < ADC_CHANNEL_COUNT; i++) {
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if (!adcConfig[i].enabled) {
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continue;
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}
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ADC_RegularChannelConfig(adc.ADCx, adcConfig[i].adcChannel, rank++, adcConfig[i].sampleTime);
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}
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ADC_DMARequestAfterLastTransferCmd(adc.ADCx, ENABLE);
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ADC_DMACmd(adc.ADCx, ENABLE);
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ADC_Cmd(adc.ADCx, ENABLE);
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ADC_SoftwareStartConv(adc.ADCx);
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}
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